Apparatus for the water concentration of ores or the like.



W. I'v. WARUM.

APPARATUS FOR THF: WATER BGNCEITRAHDN 0F GRES 0R THE LIKE.

N HLM) 1A1`.2" 1916.

APPLFCATI Fats/Med Deo. 1:2, 19H5.

WILLIAM MORLEYIIVIARTIN, OF REDRUTH, ENGLAND.

AFPARATUS FOR THE WATER CONCENTRATION OF GRES 0R THE LIKE.

Application filed January 24, 1916.

To all wlmm t may concern Be it known that I, lVILipL-ur MonLnY MARTIN, a subject of the King of Great Britain, residing at Meadowcroft, lVest Trewirgie, Redruth, Cornwall, England, have invented new and useful Improvements in Apparatus for the lVater Concentration of Ores or the like, of which the following is a specification. v

Apparatus for the water concentration of ores or the like consists according to this invention of a revolving drum whose inner circumferenee is adapted to lift the values but not the gangue from a mixture of ore and water at the bottom of the drum. This is eEected by forming thev inner surface of tbe drum of frosted fluted glass which provides markings consisting of flutes and pits which serve to lift the values without lifting the gangue. The depth of the flutes should be from a sixteenth to one thirty-second of an inch with from 16 to 40 flutes per inch according to the mesh of the pulp and the assay value of same. When the ore to be treated contains values of different sizes the markings may consist of a plurality of microscopic pits of different sizes, one series of pits being of a size best adapted to lift the values of one size and the other series of pits of a size best adapted to lift the values of the other size and so on. It is desirable first to ascertain approximately by microscopic examination the sizes ofthe mineral particles in the pulp to be concentrated and use a microscopic frostcnear to but of course larger than the varying sizes. This is effected by subjecting glass to a sand blast first with a sand of'one size say 4() mesh sand and then With a sand of another sizesay C() mesh sand, the other conditions being the same. By this means several different sized frostings can be obtained on the same glass surface.

The invention is illustrated in the accompanying drawings.

Figurel is a. sectional elevation and Fig. 2 is a section on the line 2 2 of Fig. l.

In the drawings a is a drum turning on ball bearings in a ring L and driven in any suitable manner for example as indicated by teeth J. The inner circumference of the Specification of Letters Patent.

Iatented Der. I2, 19MB..

Serial No, 73,972.

drum is lined with glass c having on one surface Hutesparallel with the axis of the drum, the iuted glass being frosted as before described. rl`he sides of the drum are flanged at rl and d the flange fl being of a size toy retain a small quantity only of lpulp Z: is a -launder leading away gangue and water from the drum a when the level rises above the flange d.

The apparatus works as follows-A mixture of metalliferous sand for example and water is fed from'the la under t' to the slowly revolving drum (L. The frosted flutes on the glass surface c coming into contact with the values raise them and they are at the upper portion of the dru'in acted upon by the sprays and so become detached. The values fall onto the inclined plane c and pass into the launder The gangue and water when above the flange' IZ flow away by the launder Z2.

In my application for Patent No. 35,645, filed June 22, 1915, I have shown and described an apparatus for concentrating ores in which the acting surface consists of frosted material, such as glass, having a plural-` zontal aXis and Whose inner surface -is formed of glass having flutes parallel with the axis of the drum provided with a plurality of microscopic pits of varying sizes.

'WILLIAM MORLEY MARTIN. 

